Locomotive drifting and by-pass valve



Dec. 1, 1936.

F. BuKovE 2,062,292

ALocoMoTIvE DRIFTING AND BY-PAss l VALVE Y ATTORNEY Y Patented Dec".1,1936 t y UNITED STAT-Es orri j; 5

zgccazez l, `LoooMo'rIvr; DRIFTING AND Biz-PASS VALVE Frank Bukov'e,Albuquerque, N. Mex., assgnorof one-half to Leslie R .`Kieh1,I`tatori,N.-l\/Iex.l Application October 1,:1934, Serial N0.'- 746,465

. n 2 Claims. (01.12144133) n 7 n c i The inventio-n relates tolocomotives and more the drifting valve constructed inaccordance with"especially to the class of valves known as driftthe` invention. l ingvalves which are used on locomotives. t Figure 2 is an enlargedsectional viewon the The primary object of the invention is the proline`2-2 Offlgll'lff 1 1,00kir1g in thedjrectionf, 0fl

5-vision of a valve of this character in associationthe4arrows"andfshowing the drifting valvesfin) 5 with a by-pass, whereincommunication between their DOSJOI .When the main; sfeamthrottle'is thetwo ends of each cylinder of the locomotive C`Sd. L is had for relievingpressure at one side of theY Figure 3is,afvicvv,,Sirrlill120,FUGZ*LhOWngly piston and vacuum at the'otherside thereof when the position of the valves when thefthrottlek is 10Working within the cylinder when live steam is Open. -f y e v. K f y 10cut off to said cylinder and thel steam throttle. .')Figurel' is aninner face' view4k lof the valve;

closed for the drifting of the locomotive, the valve. chamber cover. l ys 1 being automatically lcontrolled and assuring, in Figure 5 is a plan:View of the valve Cage., the working thereof, a free drifting of 4saidlo- Figure 6,.,15 va planiviewof lthvalve., n 1 15 comotive. f Figures?`:is an edge` elevation of .thefcover' 15 Another object of theinvention is the provshown in Figure 4. ,i i. vision of a valve of thischaracter, wherein 'the `Fglllfc :,8 isla Side elevation partly, insection .main steam throttle when actuated will autoof the valve Cage aSShOWI in Fg1l1l5f,r f .matically regulate the said valve so-'that theFigure 9is averticai longitudinal sectional view ?-v by-passing ofcylinder atmosphere starts 'inthrough thejvalve.. n t

stantly by the closing of said throttle, and thus Similar referencercharacters' indicate corredrifting of the locomotive is obtained with a,SDOIlding Darts" throughout theseveral viewsln minimum change incylindertemperatur'e. the drawingsv o A further object of the inventionis'the pro- Referring tothe drawings in detail, particu'- vision of 'avalve lof this character, wherein on larlyligures 1,2., and 3, thepresent invention is 25 the closing of the main throttle valve,circulation disclosed inf-connection with an engine'. cylir'rderv of airand vapor from the compression side of A provided with-what is vcommonlytermed.in'side the piston to the vacuum side during the entire steamadmission having a pistonvalve Illope'r-v strokev of the piston ishadwhile the engine is ated bythe'valverod il ,withinlthevalvechamdrifting, and such valve is controlled by the-.main ber I2y and`having the steam space It3 co ml '30 throttle valve which regulatesthefturnin'g onor `municating` with the. steamy chest lil,y which is,cutting oir of steam to the cylinder of the locolocatedcentrallybetweenthe `ends ofthefcylim" motive and the now of thelivesteam vfor the der. Steam .ports AI6 occur in thest'eamtspace working ofthe piston 4in this cylinder'is'regu- 'and in the' wall of -the valvechamber, theports' 'Y lated by the 'steam chest valve` inthe usual orbeing adapted to be closed by the valve-|0111 3.5 conventional manner,it being unnecessary and .Certain `positions thereof. v`.Iilvxliaustoccursv in. not required for any material change in they arthewalliofjthe valvechamber at the outerend of rangement of the steam-chestand the cylinder*` the valve at eachextremitynof the valve stroke of thelocomotive or the respective valve and piston. and, this A"exhaust kis`had through the f exhaust 4 working therein. v channel ISand smokechamber of the locomotive 'Y Y A still further object ofthe invention isthe inthe usual manner.k .The steam ports Hicom-- provision of a valveofv this character in assomunicatewiththe passage I1, which surroundsvciation with a by-pass, which is simplein conthefvalve chamber bushingat these points, and struction, thoroughly reliable and effective in its,communicate with their-.respective ends of the operation, automaticinaction, readily and easily cylinder A 'through openings I8.;A'Arsusual,` thev 45' accessible for inspection, repair or replacement,series of steam and exhaustportsrare as one and positive of operation,strong, durable, and inexoccur Ain the circular wall of the valvechamber.- pensive to manufacture and install. bushing, theports beingydefined by the cyclic'.v

.With these and other objects in view, the in- -position of the valverespective to thesad Jports. 50 ,vention consists in thefeatures ofconstruction, That is to'say, the valve moved to a'directlon ,of

combination and arrangement'of parts as will be uncovering the ports ontheH steam. Space Side hereinafter more fully described in detail,illuspermits the flow-of steamvto the cylinder. 'Thel trated in theaccompanying drawings, which vdisvalve novedto the oppositedirectionthesefsame close the preferred embodiment of the invention,`ports close and are again juncoveredon,an oppor "rif and pointed out inthe claims hereunto v'apjsiteside of the' valve, ythev spent steaminthe5.0,

Cil

pended. y 4 cylinder l'escaping throughthese portsl and* out In theaccompanying drawings: into the exhaust channel |5.v l H i n Figure 1 isa fragmentary front elevation of A piston *I9 is shown operating withinIthe G0. a locomotive, one steam chest and piston cylinderk cylinder Ainthe usual manner..l vThe Aopeg'ation 60 n being in section toillustrate the application of. of the piston valve. l0 inthe valvevchamber of of the type shown during t'he application of thej steam tothe engine and the structure of these parts may be considered common tolocomotives of this type and. typical of locomotive engines having thesame function. l .l

It is, of course, understood that an engine cylinder A is at each sideof the locomotive and likewise the steam chest I4 and` it is to beunderstood that while in the following description and in whathaspreceded, reference is usually made to only one cylinder and one .steamchest, etc., there are corresponding and duplicate parts on the oppositeside of the locomotive.

Provided vadjacent to the cylinder A and par-- allel with the same andthe steam chest I4 is'a channel 35l having located near opposite endsand countersunk with respect theretor valve spaces 20, these beingconfronted with valve cages 2l removably fitted in openings 22accessible exteriorly and fitted with removable coverplates 23, theopenings I8 being intersected by the spaces 20, so that the 'channel 35at its ends has communication with the'cylinder A at opposite endsthereof and also with the steam ports of the valve chamber I2.

Arranged within these valve cages 2| are drifting valves 24, the bottomsthereof being adapted for engagement with seats 26 provided in saidcages 2|, while the tops 21 areadaptable for engagementlwith seats 28interiorly of'the said cages 2l, these cages being formed withperipheral openings 29 and the said valves 24 being of hollow formationand open at their tops and bottoms. Centrally fitted in these valves 24are st`ems 30, the upper portions thereof being slidably fitted incenter hulov formations 3| on the cages2l, while the lowerportlons 32 ofthese stems 30are passed through webs 33 and freely slide therein, sothat said lower ends 32 will project into steam pockets 34 and operateas pistons. The pockets' 34 communicate with the steam space I3 by leads31.

The cover plates 23 are removably secured in place by fasteners 36 andon their removal, access can be had to the cages 2l and also the valves24.

The valves 24, when in the position as shown in Figures l and 2 of thedrawings, permit cylinder atmosphere to pass back and forth from oneside of the piston I8 to the other through the channel and this iseffected when the main steam throttle is closed, resulting in the Kdropping of the steam pressure inV the main steam chest I4 and in thepockets 34 to zero, thus relieving kthe pressure of the steam againstthe lower ends 32 of the'stems 30 of the valves 24,

causing the' latter to drop or become lowered for' the opening movementthereof under their own weight in conjunction with the suction action ofthe piston I9 in lthe cylinder A, the latter being in communication withthe valve I0 in the steam chest I4. In the opening of the valves 24,these become unseated from the seats 26 and 28, so

' that communication will be established through the passages I8 and thechannel 35. these passages functioning as by-passes, and thus thelatmosphere in the cylinder A isset free to ow and will move back andforth through the passages I8 and channel 35 and thus equalize the valvesteam chamber vand cylinder condition, so that the piston I9 drifts,causing the interior atmosphere to flow through and around the driftvalves 24 to opposite ends of the cylinder A without drawing in exterioratmosphere through the exhaurstrpassages I5. f

When the main steam throttle is open, une valves 24 will be lifted bythe steam pressure in the pockets 34 acting upon the lower ends 32 ofthe stems 30 of such valves and these lower ends functioning as pistons,so that live steam from the steam chest I4 will automatically operatesaid valves 24 and thusvshut off the by-passing of atmosphere within thecylinder A from one side of thepiston I 9 tothe other through thechannel 35 and these valves 24 will remain closed or seated against theseats 26 of the cages as long as steam is worked into the cylinder A foroperating the locomotive.

The leads 31 from thepockets 34 converge inwardly and upwardly into ythesteam space I3 in the chest I4. steam directed to the pockets 34 willplay upon the vends 32 of the stems 30 and these' ends 32 function aspistons for the valves 24 to lift the s'ame under the pressure of thesteam when the main steam throttle is open.

. From the foregoing it is thought that the construction and manner ofoperation of the structure will be clearly understood and, therefore, amore extended explanation has been omitted.

The invention is susceptible of various changes in its form, proportionsand minor details of construction andthe right is herein reserved tomake such vchanges as properly fall within the scope of the appendedclaims.

What is claimed is:

1. In combination .with a locomotive cylinder having a circulatingconduit and a cored port communicating between the ends of the conduitand the cylinder; of a valve cage located at said It shouldvbe apparentthat the port and in said conduit and a valve in said cage having apiston stem for controlling the valve by steam pressure for permittingby-passing of cylinder atmosphere through said conduit from one end ofthe cylinder to the other, said cage having openings lin its sidesaclosed top and an open bottom, and said top having an opening for theone end o f ,the stem of the valve, a cap member through which said endof the stem passes removably securing the cage in position, said valvecomprising a hollow member which is rounded inwardly from its ends toits center and 'which in one position has .its ends in contact with theclosed top and'open bottom edge of the cage and l thesecond or lower endof the valve s tem providing the piston therefor. l

2. In combination with `a. locomotive cylinder having a circulatingconduit anda cored port communicating between the ends of the condultand the cylinder; of a valve cage located at said port and in saidconduit and a valve in said cage having a piston stem for controllingthe valve by steam pressure for permitting by-passing of cylinderatmosphere through said conduit from one end of the cylinder to theother,`said cage having openingsin its sides, a closed top and an openbottom, and said top having an opening for the one end of the stem'ofthe valve, a cap member'A through which said end of the stem passesremovably securing the cage in position, said valve forming a seal, withthe cage above and below the side openings therein and the lower end rofthe valve stem providing the piston for operating the valve.

FRANK BUKOVE.

